<?php

/**
 * Facilitates adding of the WordPress editor as used on the Write and Edit screens.
 *
 * @package WordPress
 * @since 3.3.0
 *
 * Private, not included by default. See wp_editor() in wp-includes/general-template.php.
 */
final class _WP_Editors {

    public static $mce_locale;
    private static $mce_settings = array();
    private static $qt_settings = array();
    private static $plugins = array();
    private static $qt_buttons = array();
    private static $ext_plugins;
    private static $baseurl;
    private static $first_init;
    private static $this_tinymce = false;
    private static $this_quicktags = false;
    private static $has_tinymce = false;
    private static $has_quicktags = false;
    private static $has_medialib = false;
    private static $editor_buttons_css = true;
    private static $drag_drop_upload = false;

    private function __construct() {
        
    }

    /**
     * Parse default arguments for the editor instance.
     *
     * @param string $editor_id ID for the current editor instance.
     * @param array  $settings {
     *     Array of editor arguments.
     *
     *     @type bool       $wpautop           Whether to use wpautop(). Default true.
     *     @type bool       $media_buttons     Whether to show the Add Media/other media buttons.
     *     @type string     $default_editor    When both TinyMCE and Quicktags are used, set which
     *                                         editor is shown on page load. Default empty.
     *     @type bool       $drag_drop_upload  Whether to enable drag & drop on the editor uploading. Default false.
     *                                         Requires the media modal.
     *     @type string     $textarea_name     Give the textarea a unique name here. Square brackets
     *                                         can be used here. Default $editor_id.
     *     @type int        $textarea_rows     Number rows in the editor textarea. Default 20.
     *     @type string|int $tabindex          Tabindex value to use. Default empty.
     *     @type string     $tabfocus_elements The previous and next element ID to move the focus to
     *                                         when pressing the Tab key in TinyMCE. Defualt ':prev,:next'.
     *     @type string     $editor_css        Intended for extra styles for both Visual and Text editors.
     *                                         Should include <style> tags, and can use "scoped". Default empty.
     *     @type string     $editor_class      Extra classes to add to the editor textarea elemen. Default empty.
     *     @type bool       $teeny             Whether to output the minimal editor config. Examples include
     *                                         Press This and the Comment editor. Default false.
     *     @type bool       $dfw               Whether to replace the default fullscreen with "Distraction Free
     *                                         Writing". DFW requires specific DOM elements and css). Default false.
     *     @type bool|array $tinymce           Whether to load TinyMCE. Can be used to pass settings directly to
     *                                         TinyMCE using an array. Default true.
     *     @type bool|array $quicktags         Whether to load Quicktags. Can be used to pass settings directly to
     *                                         Quicktags using an array. Default true.
     * }
     * @return array Parsed arguments array.
     */
    public static function parse_settings($editor_id, $settings) {

        /**
         * Filter the wp_editor() settings.
         *
         * @since 4.0.0
         *
         * @see _WP_Editors()::parse_settings()
         *
         * @param array  $settings  Array of editor arguments.
         * @param string $editor_id ID for the current editor instance.
         */
        $settings = apply_filters('wp_editor_settings', $settings, $editor_id);

        $set = wp_parse_args($settings, array(
            'wpautop' => true,
            'media_buttons' => true,
            'default_editor' => '',
            'drag_drop_upload' => false,
            'textarea_name' => $editor_id,
            'textarea_rows' => 20,
            'tabindex' => '',
            'tabfocus_elements' => ':prev,:next',
            'editor_css' => '',
            'editor_class' => '',
            'teeny' => false,
            'dfw' => false,
            'tinymce' => true,
            'quicktags' => true
                ));

        self::$this_tinymce = ( $set['tinymce'] && user_can_richedit() );

        if (self::$this_tinymce) {
            if (false !== strpos($editor_id, '[')) {
                self::$this_tinymce = false;
                _deprecated_argument('wp_editor()', '3.9', 'TinyMCE editor IDs cannot have brackets.');
            }
        }

        self::$this_quicktags = (bool) $set['quicktags'];

        if (self::$this_tinymce)
            self::$has_tinymce = true;

        if (self::$this_quicktags)
            self::$has_quicktags = true;

        if (empty($set['editor_height']))
            return $set;

        if ('content' === $editor_id && empty($set['tinymce']['wp_autoresize_on'])) {
            // A cookie (set when a user resizes the editor) overrides the height.
            $cookie = (int) get_user_setting('ed_size');

            // Upgrade an old TinyMCE cookie if it is still around, and the new one isn't.
            if (!$cookie && isset($_COOKIE['TinyMCE_content_size'])) {
                parse_str($_COOKIE['TinyMCE_content_size'], $cookie);
                $cookie = $cookie['ch'];
            }

            if ($cookie)
                $set['editor_height'] = $cookie;
        }

        if ($set['editor_height'] < 50)
            $set['editor_height'] = 50;
        elseif ($set['editor_height'] > 5000)
            $set['editor_height'] = 5000;

        return $set;
    }

    /**
     * Outputs the HTML for a single instance of the editor.
     *
     * @param string $content The initial content of the editor.
     * @param string $editor_id ID for the textarea and TinyMCE and Quicktags instances (can contain only ASCII letters and numbers).
     * @param array $settings See the _parse_settings() method for description.
     */
    public static function editor($content, $editor_id, $settings = array()) {

        $set = self::parse_settings($editor_id, $settings);
        $editor_class = ' class="' . trim($set['editor_class'] . ' wp-editor-area') . '"';
        $tabindex = $set['tabindex'] ? ' tabindex="' . (int) $set['tabindex'] . '"' : '';
        $switch_class = 'html-active';
        $toolbar = $buttons = $autocomplete = '';

        if ($set['drag_drop_upload']) {
            self::$drag_drop_upload = true;
        }

        if (!empty($set['editor_height']))
            $height = ' style="height: ' . $set['editor_height'] . 'px"';
        else
            $height = ' rows="' . $set['textarea_rows'] . '"';

        if (!current_user_can('upload_files'))
            $set['media_buttons'] = false;

        if (!self::$this_quicktags && self::$this_tinymce) {
            $switch_class = 'tmce-active';
            $autocomplete = ' autocomplete="off"';
        } elseif (self::$this_quicktags && self::$this_tinymce) {
            $default_editor = $set['default_editor'] ? $set['default_editor'] : wp_default_editor();
            $autocomplete = ' autocomplete="off"';

            // 'html' is used for the "Text" editor tab.
            if ('html' === $default_editor) {
                add_filter('the_editor_content', 'wp_htmledit_pre');
                $switch_class = 'html-active';
            } else {
                add_filter('the_editor_content', 'wp_richedit_pre');
                $switch_class = 'tmce-active';
            }

            $buttons .= '<a id="' . $editor_id . '-html" class="wp-switch-editor switch-html" onclick="switchEditors.switchto(this);">' . _x('Text', 'Name for the Text editor tab (formerly HTML)') . "</a>\n";
            $buttons .= '<a id="' . $editor_id . '-tmce" class="wp-switch-editor switch-tmce" onclick="switchEditors.switchto(this);">' . __('Visual') . "</a>\n";
        }

        $wrap_class = 'wp-core-ui wp-editor-wrap ' . $switch_class;

        if ($set['dfw']) {
            $wrap_class .= ' has-dfw';
        }

        echo '<div id="wp-' . $editor_id . '-wrap" class="' . $wrap_class . '">';

        if (self::$editor_buttons_css) {
            wp_print_styles('editor-buttons');
            self::$editor_buttons_css = false;
        }

        if (!empty($set['editor_css']))
            echo $set['editor_css'] . "\n";

        if (!empty($buttons) || $set['media_buttons']) {
            echo '<div id="wp-' . $editor_id . '-editor-tools" class="wp-editor-tools hide-if-no-js">';

            if ($set['media_buttons']) {
                self::$has_medialib = true;

                if (!function_exists('media_buttons'))
                    include(ABSPATH . 'wp-admin/includes/media.php');

                echo '<div id="wp-' . $editor_id . '-media-buttons" class="wp-media-buttons">';

                /**
                 * Fires after the default media button(s) are displayed.
                 *
                 * @since 2.5.0
                 *
                 * @param string $editor_id Unique editor identifier, e.g. 'content'.
                 */
                do_action('media_buttons', $editor_id);
                echo "</div>\n";
            }

            echo '<div class="wp-editor-tabs">' . $buttons . "</div>\n";
            echo "</div>\n";
        }

        /**
         * Filter the HTML markup output that displays the editor.
         *
         * @since 2.1.0
         *
         * @param string $output Editor's HTML markup.
         */
        $the_editor = apply_filters('the_editor', '<div id="wp-' . $editor_id . '-editor-container" class="wp-editor-container">' .
                '<textarea' . $editor_class . $height . $tabindex . $autocomplete . ' cols="40" name="' . $set['textarea_name'] . '" ' .
                'id="' . $editor_id . '">%s</textarea></div>');

        /**
         * Filter the default editor content.
         *
         * @since 2.1.0
         *
         * @param string $content Default editor content.
         */
        $content = apply_filters('the_editor_content', $content);

        printf($the_editor, $content);
        echo "\n</div>\n\n";

        self::editor_settings($editor_id, $set);
    }

    public static function editor_settings($editor_id, $set) {
        $first_run = false;

        if (empty(self::$first_init)) {
            if (is_admin()) {
                add_action('admin_print_footer_scripts', array(__CLASS__, 'editor_js'), 50);
                add_action('admin_print_footer_scripts', array(__CLASS__, 'enqueue_scripts'), 1);
            } else {
                add_action('wp_print_footer_scripts', array(__CLASS__, 'editor_js'), 50);
                add_action('wp_print_footer_scripts', array(__CLASS__, 'enqueue_scripts'), 1);
            }
        }

        if (self::$this_quicktags) {

            $qtInit = array(
                'id' => $editor_id,
                'buttons' => ''
            );

            if (is_array($set['quicktags']))
                $qtInit = array_merge($qtInit, $set['quicktags']);

            if (empty($qtInit['buttons']))
                $qtInit['buttons'] = 'strong,em,link,block,del,ins,img,ul,ol,li,code,more,close';

            if ($set['dfw'])
                $qtInit['buttons'] .= ',fullscreen';

            /**
             * Filter the Quicktags settings.
             *
             * @since 3.3.0
             *
             * @param array  $qtInit    Quicktags settings.
             * @param string $editor_id The unique editor ID, e.g. 'content'.
             */
            $qtInit = apply_filters('quicktags_settings', $qtInit, $editor_id);

            self::$qt_settings[$editor_id] = $qtInit;

            self::$qt_buttons = array_merge(self::$qt_buttons, explode(',', $qtInit['buttons']));
        }

        if (self::$this_tinymce) {

            if (empty(self::$first_init)) {
                self::$baseurl = includes_url('js/tinymce');

                $mce_locale = get_locale();
                self::$mce_locale = $mce_locale = empty($mce_locale) ? 'en' : strtolower(substr($mce_locale, 0, 2)); // ISO 639-1

                /** This filter is documented in wp-admin/includes/media.php */
                $no_captions = (bool) apply_filters('disable_captions', '');
                $first_run = true;
                $ext_plugins = '';

                if ($set['teeny']) {

                    /**
                     * Filter the list of teenyMCE plugins.
                     *
                     * @since 2.7.0
                     *
                     * @param array  $plugins   An array of teenyMCE plugins.
                     * @param string $editor_id Unique editor identifier, e.g. 'content'.
                     */
                    self::$plugins = $plugins = apply_filters('teeny_mce_plugins', array('colorpicker', 'lists', 'fullscreen', 'image', 'wordpress', 'wpeditimage', 'wplink'), $editor_id);
                } else {

                    /**
                     * Filter the list of TinyMCE external plugins.
                     *
                     * The filter takes an associative array of external plugins for
                     * TinyMCE in the form 'plugin_name' => 'url'.
                     *
                     * The url should be absolute, and should include the js filename
                     * to be loaded. For example:
                     * 'myplugin' => 'http://mysite.com/wp-content/plugins/myfolder/mce_plugin.js'.
                     *
                     * If the external plugin adds a button, it should be added with
                     * one of the 'mce_buttons' filters.
                     *
                     * @since 2.5.0
                     *
                     * @param array $external_plugins An array of external TinyMCE plugins.
                     */
                    $mce_external_plugins = apply_filters('mce_external_plugins', array());

                    $plugins = array(
                        'charmap',
                        'colorpicker',
                        'hr',
                        'lists',
                        'media',
                        'paste',
                        'tabfocus',
                        'textcolor',
                        'fullscreen',
                        'wordpress',
                        'wpautoresize',
                        'wpeditimage',
                        'wpgallery',
                        'wplink',
                        'wpdialogs',
                        'wpview',
                    );

                    if (!self::$has_medialib) {
                        $plugins[] = 'image';
                    }

                    /**
                     * Filter the list of default TinyMCE plugins.
                     *
                     * The filter specifies which of the default plugins included
                     * in WordPress should be added to the TinyMCE instance.
                     *
                     * @since 3.3.0
                     *
                     * @param array $plugins An array of default TinyMCE plugins.
                     */
                    $plugins = array_unique(apply_filters('tiny_mce_plugins', $plugins));

                    if (( $key = array_search('spellchecker', $plugins) ) !== false) {
                        // Remove 'spellchecker' from the internal plugins if added with 'tiny_mce_plugins' filter to prevent errors.
                        // It can be added with 'mce_external_plugins'.
                        unset($plugins[$key]);
                    }

                    if (!empty($mce_external_plugins)) {

                        /**
                         * Filter the translations loaded for external TinyMCE 3.x plugins.
                         *
                         * The filter takes an associative array ('plugin_name' => 'path')
                         * where 'path' is the include path to the file.
                         *
                         * The language file should follow the same format as wp_mce_translation(),
                         * and should define a variable ($strings) that holds all translated strings.
                         *
                         * @since 2.5.0
                         *
                         * @param array $translations Translations for external TinyMCE plugins.
                         */
                        $mce_external_languages = apply_filters('mce_external_languages', array());

                        $loaded_langs = array();
                        $strings = '';

                        if (!empty($mce_external_languages)) {
                            foreach ($mce_external_languages as $name => $path) {
                                if (@is_file($path) && @is_readable($path)) {
                                    include_once( $path );
                                    $ext_plugins .= $strings . "\n";
                                    $loaded_langs[] = $name;
                                }
                            }
                        }

                        foreach ($mce_external_plugins as $name => $url) {
                            if (in_array($name, $plugins, true)) {
                                unset($mce_external_plugins[$name]);
                                continue;
                            }

                            $url = set_url_scheme($url);
                            $mce_external_plugins[$name] = $url;
                            $plugurl = dirname($url);
                            $strings = $str1 = $str2 = '';

                            // Try to load langs/[locale].js and langs/[locale]_dlg.js
                            if (!in_array($name, $loaded_langs, true)) {
                                $path = str_replace(content_url(), '', $plugurl);
                                $path = WP_CONTENT_DIR . $path . '/langs/';

                                if (function_exists('realpath'))
                                    $path = trailingslashit(realpath($path));

                                if (@is_file($path . $mce_locale . '.js'))
                                    $strings .= @file_get_contents($path . $mce_locale . '.js') . "\n";

                                if (@is_file($path . $mce_locale . '_dlg.js'))
                                    $strings .= @file_get_contents($path . $mce_locale . '_dlg.js') . "\n";

                                if ('en' != $mce_locale && empty($strings)) {
                                    if (@is_file($path . 'en.js')) {
                                        $str1 = @file_get_contents($path . 'en.js');
                                        $strings .= preg_replace('/([\'"])en\./', '$1' . $mce_locale . '.', $str1, 1) . "\n";
                                    }

                                    if (@is_file($path . 'en_dlg.js')) {
                                        $str2 = @file_get_contents($path . 'en_dlg.js');
                                        $strings .= preg_replace('/([\'"])en\./', '$1' . $mce_locale . '.', $str2, 1) . "\n";
                                    }
                                }

                                if (!empty($strings))
                                    $ext_plugins .= "\n" . $strings . "\n";
                            }

                            $ext_plugins .= 'tinyMCEPreInit.load_ext("' . $plugurl . '", "' . $mce_locale . '");' . "\n";
                            $ext_plugins .= 'tinymce.PluginManager.load("' . $name . '", "' . $url . '");' . "\n";
                        }
                    }
                }

                if ($set['dfw'])
                    $plugins[] = 'wpfullscreen';

                self::$plugins = $plugins;
                self::$ext_plugins = $ext_plugins;

                self::$first_init = array(
                    'theme' => 'modern',
                    'skin' => 'lightgray',
                    'language' => self::$mce_locale,
                    'formats' => "{
						alignleft: [
							{selector: 'p,h1,h2,h3,h4,h5,h6,td,th,div,ul,ol,li', styles: {textAlign:'left'}},
							{selector: 'img,table,dl.wp-caption', classes: 'alignleft'}
						],
						aligncenter: [
							{selector: 'p,h1,h2,h3,h4,h5,h6,td,th,div,ul,ol,li', styles: {textAlign:'center'}},
							{selector: 'img,table,dl.wp-caption', classes: 'aligncenter'}
						],
						alignright: [
							{selector: 'p,h1,h2,h3,h4,h5,h6,td,th,div,ul,ol,li', styles: {textAlign:'right'}},
							{selector: 'img,table,dl.wp-caption', classes: 'alignright'}
						],
						strikethrough: {inline: 'del'}
					}",
                    'relative_urls' => false,
                    'remove_script_host' => false,
                    'convert_urls' => false,
                    'browser_spellcheck' => true,
                    'fix_list_elements' => true,
                    'entities' => '38,amp,60,lt,62,gt',
                    'entity_encoding' => 'raw',
                    'keep_styles' => false,
                    // Limit the preview styles in the menu/toolbar
                    'preview_styles' => 'font-family font-size font-weight font-style text-decoration text-transform',
                    'wpeditimage_disable_captions' => $no_captions,
                    'wpeditimage_html5_captions' => current_theme_supports('html5', 'caption'),
                    'plugins' => implode(',', $plugins),
                );

                if (!empty($mce_external_plugins)) {
                    self::$first_init['external_plugins'] = json_encode($mce_external_plugins);
                }

                $suffix = defined('SCRIPT_DEBUG') && SCRIPT_DEBUG ? '' : '.min';
                $version = 'ver=' . $GLOBALS['wp_version'];
                $dashicons = includes_url("css/dashicons$suffix.css?$version");

                // WordPress default stylesheet and dashicons
                $mce_css = array(
                    $dashicons,
                    self::$baseurl . '/skins/wordpress/wp-content.css?' . $version
                );

                $editor_styles = get_editor_stylesheets();
                if (!empty($editor_styles)) {
                    foreach ($editor_styles as $style) {
                        $mce_css[] = $style;
                    }
                }

                /**
                 * Filter the comma-delimited list of stylesheets to load in TinyMCE.
                 *
                 * @since 2.1.0
                 *
                 * @param array $stylesheets Comma-delimited list of stylesheets.
                 */
                $mce_css = trim(apply_filters('mce_css', implode(',', $mce_css)), ' ,');

                if (!empty($mce_css))
                    self::$first_init['content_css'] = $mce_css;
            }

            if ($set['teeny']) {

                /**
                 * Filter the list of teenyMCE buttons (Text tab).
                 *
                 * @since 2.7.0
                 *
                 * @param array  $buttons   An array of teenyMCE buttons.
                 * @param string $editor_id Unique editor identifier, e.g. 'content'.
                 */
                $mce_buttons = apply_filters('teeny_mce_buttons', array('bold', 'italic', 'underline', 'blockquote', 'strikethrough', 'bullist', 'numlist', 'alignleft', 'aligncenter', 'alignright', 'undo', 'redo', 'link', 'unlink', 'fullscreen'), $editor_id);
                $mce_buttons_2 = $mce_buttons_3 = $mce_buttons_4 = array();
            } else {

                /**
                 * Filter the first-row list of TinyMCE buttons (Visual tab).
                 *
                 * @since 2.0.0
                 *
                 * @param array  $buttons   First-row list of buttons.
                 * @param string $editor_id Unique editor identifier, e.g. 'content'.
                 */
                $mce_buttons = apply_filters('mce_buttons', array('bold', 'italic', 'strikethrough', 'bullist', 'numlist', 'blockquote', 'hr', 'alignleft', 'aligncenter', 'alignright', 'link', 'unlink', 'wp_more', 'spellchecker', 'fullscreen', 'wp_adv'), $editor_id);

                /**
                 * Filter the second-row list of TinyMCE buttons (Visual tab).
                 *
                 * @since 2.0.0
                 *
                 * @param array  $buttons   Second-row list of buttons.
                 * @param string $editor_id Unique editor identifier, e.g. 'content'.
                 */
                $mce_buttons_2 = apply_filters('mce_buttons_2', array('formatselect', 'underline', 'alignjustify', 'forecolor', 'pastetext', 'removeformat', 'charmap', 'outdent', 'indent', 'undo', 'redo', 'wp_help'), $editor_id);

                /**
                 * Filter the third-row list of TinyMCE buttons (Visual tab).
                 *
                 * @since 2.0.0
                 *
                 * @param array  $buttons   Third-row list of buttons.
                 * @param string $editor_id Unique editor identifier, e.g. 'content'.
                 */
                $mce_buttons_3 = apply_filters('mce_buttons_3', array(), $editor_id);

                /**
                 * Filter the fourth-row list of TinyMCE buttons (Visual tab).
                 *
                 * @since 2.5.0
                 *
                 * @param array  $buttons   Fourth-row list of buttons.
                 * @param string $editor_id Unique editor identifier, e.g. 'content'.
                 */
                $mce_buttons_4 = apply_filters('mce_buttons_4', array(), $editor_id);
            }

            $body_class = $editor_id;

            if ($post = get_post()) {
                $body_class .= ' post-type-' . sanitize_html_class($post->post_type) . ' post-status-' . sanitize_html_class($post->post_status);
                if (post_type_supports($post->post_type, 'post-formats')) {
                    $post_format = get_post_format($post);
                    if ($post_format && !is_wp_error($post_format))
                        $body_class .= ' post-format-' . sanitize_html_class($post_format);
                    else
                        $body_class .= ' post-format-standard';
                }
            }

            if (!empty($set['tinymce']['body_class'])) {
                $body_class .= ' ' . $set['tinymce']['body_class'];
                unset($set['tinymce']['body_class']);
            }

            if ($set['dfw']) {
                // replace the first 'fullscreen' with 'wp_fullscreen'
                if (($key = array_search('fullscreen', $mce_buttons)) !== false)
                    $mce_buttons[$key] = 'wp_fullscreen';
                elseif (($key = array_search('fullscreen', $mce_buttons_2)) !== false)
                    $mce_buttons_2[$key] = 'wp_fullscreen';
                elseif (($key = array_search('fullscreen', $mce_buttons_3)) !== false)
                    $mce_buttons_3[$key] = 'wp_fullscreen';
                elseif (($key = array_search('fullscreen', $mce_buttons_4)) !== false)
                    $mce_buttons_4[$key] = 'wp_fullscreen';
            }

            $mceInit = array(
                'selector' => "#$editor_id",
                'resize' => 'vertical',
                'menubar' => false,
                'wpautop' => (bool) $set['wpautop'],
                'indent' => !$set['wpautop'],
                'toolbar1' => implode($mce_buttons, ','),
                'toolbar2' => implode($mce_buttons_2, ','),
                'toolbar3' => implode($mce_buttons_3, ','),
                'toolbar4' => implode($mce_buttons_4, ','),
                'tabfocus_elements' => $set['tabfocus_elements'],
                'body_class' => $body_class
            );

            if ($first_run)
                $mceInit = array_merge(self::$first_init, $mceInit);

            if (is_array($set['tinymce']))
                $mceInit = array_merge($mceInit, $set['tinymce']);

            /*
             * For people who really REALLY know what they're doing with TinyMCE
             * You can modify $mceInit to add, remove, change elements of the config
             * before tinyMCE.init. Setting "valid_elements", "invalid_elements"
             * and "extended_valid_elements" can be done through this filter. Best
             * is to use the default cleanup by not specifying valid_elements,
             * as TinyMCE contains full set of XHTML 1.0.
             */
            if ($set['teeny']) {

                /**
                 * Filter the teenyMCE config before init.
                 *
                 * @since 2.7.0
                 *
                 * @param array  $mceInit   An array with teenyMCE config.
                 * @param string $editor_id Unique editor identifier, e.g. 'content'.
                 */
                $mceInit = apply_filters('teeny_mce_before_init', $mceInit, $editor_id);
            } else {

                /**
                 * Filter the TinyMCE config before init.
                 *
                 * @since 2.5.0
                 *
                 * @param array  $mceInit   An array with TinyMCE config.
                 * @param string $editor_id Unique editor identifier, e.g. 'content'.
                 */
                $mceInit = apply_filters('tiny_mce_before_init', $mceInit, $editor_id);
            }

            if (empty($mceInit['toolbar3']) && !empty($mceInit['toolbar4'])) {
                $mceInit['toolbar3'] = $mceInit['toolbar4'];
                $mceInit['toolbar4'] = '';
            }

            self::$mce_settings[$editor_id] = $mceInit;
        } // end if self::$this_tinymce
    }

    private static function _parse_init($init) {
        $options = '';

        foreach ($init as $k => $v) {
            if (is_bool($v)) {
                $val = $v ? 'true' : 'false';
                $options .= $k . ':' . $val . ',';
                continue;
            } elseif (!empty($v) && is_string($v) && ( ('{' == $v{0} && '}' == $v{strlen($v) - 1}) || ('[' == $v{0} && ']' == $v{strlen($v) - 1}) || preg_match('/^\(?function ?\(/', $v) )) {
                $options .= $k . ':' . $v . ',';
                continue;
            }
            $options .= $k . ':"' . $v . '",';
        }

        return '{' . trim($options, ' ,') . '}';
    }

    public static function enqueue_scripts() {
        wp_enqueue_script('word-count');

        if (self::$has_tinymce)
            wp_enqueue_script('editor');

        if (self::$has_quicktags) {
            wp_enqueue_script('quicktags');
            wp_enqueue_style('buttons');
        }

        if (in_array('wplink', self::$plugins, true) || in_array('link', self::$qt_buttons, true)) {
            wp_enqueue_script('wplink');
        }

        if (in_array('wpfullscreen', self::$plugins, true) || in_array('fullscreen', self::$qt_buttons, true))
            wp_enqueue_script('wp-fullscreen');

        if (self::$has_medialib) {
            add_thickbox();
            wp_enqueue_script('media-upload');
        }

        /**
         * Fires when scripts and styles are enqueued for the editor.
         *
         * @since 3.9.0
         *
         * @param array $to_load An array containing boolean values whether TinyMCE
         *                       and Quicktags are being loaded.
         */
        do_action('wp_enqueue_editor', array(
            'tinymce' => self::$has_tinymce,
            'quicktags' => self::$has_quicktags,
        ));
    }

    public static function wp_mce_translation() {

        $mce_translation = array(
            // Default TinyMCE strings
            'New document' => __('New document'),
            'Formats' => _x('Formats', 'TinyMCE'),
            'Headings' => _x('Headings', 'TinyMCE'),
            'Heading 1' => __('Heading 1'),
            'Heading 2' => __('Heading 2'),
            'Heading 3' => __('Heading 3'),
            'Heading 4' => __('Heading 4'),
            'Heading 5' => __('Heading 5'),
            'Heading 6' => __('Heading 6'),
            /* translators: block tags */
            'Blocks' => _x('Blocks', 'TinyMCE'),
            'Paragraph' => __('Paragraph'),
            'Blockquote' => __('Blockquote'),
            'Div' => _x('Div', 'HTML tag'),
            'Pre' => _x('Pre', 'HTML tag'),
            'Address' => _x('Address', 'HTML tag'),
            'Inline' => _x('Inline', 'HTML elements'),
            'Underline' => __('Underline'),
            'Strikethrough' => __('Strikethrough'),
            'Subscript' => __('Subscript'),
            'Superscript' => __('Superscript'),
            'Clear formatting' => __('Clear formatting'),
            'Bold' => __('Bold'),
            'Italic' => __('Italic'),
            'Code' => _x('Code', 'editor button'),
            'Source code' => __('Source code'),
            'Font Family' => __('Font Family'),
            'Font Sizes' => __('Font Sizes'),
            'Align center' => __('Align center'),
            'Align right' => __('Align right'),
            'Align left' => __('Align left'),
            'Justify' => __('Justify'),
            'Increase indent' => __('Increase indent'),
            'Decrease indent' => __('Decrease indent'),
            'Cut' => __('Cut'),
            'Copy' => __('Copy'),
            'Paste' => __('Paste'),
            'Select all' => __('Select all'),
            'Undo' => __('Undo'),
            'Redo' => __('Redo'),
            'Ok' => __('OK'),
            'Cancel' => __('Cancel'),
            'Close' => __('Close'),
            'Visual aids' => __('Visual aids'),
            'Bullet list' => __('Bulleted list'),
            'Numbered list' => __('Numbered list'),
            'Square' => _x('Square', 'list style'),
            'Default' => _x('Default', 'list style'),
            'Circle' => _x('Circle', 'list style'),
            'Disc' => _x('Disc', 'list style'),
            'Lower Greek' => _x('Lower Greek', 'list style'),
            'Lower Alpha' => _x('Lower Alpha', 'list style'),
            'Upper Alpha' => _x('Upper Alpha', 'list style'),
            'Upper Roman' => _x('Upper Roman', 'list style'),
            'Lower Roman' => _x('Lower Roman', 'list style'),
            // Anchor plugin
            'Name' => _x('Name', 'Name of link anchor (TinyMCE)'),
            'Anchor' => _x('Anchor', 'Link anchor (TinyMCE)'),
            'Anchors' => _x('Anchors', 'Link anchors (TinyMCE)'),
            // Fullpage plugin
            'Document properties' => __('Document properties'),
            'Robots' => __('Robots'),
            'Title' => __('Title'),
            'Keywords' => __('Keywords'),
            'Encoding' => __('Encoding'),
            'Description' => __('Description'),
            'Author' => __('Author'),
            // Media, image plugins
            'Insert/edit image' => __('Insert/edit image'),
            'General' => __('General'),
            'Advanced' => __('Advanced'),
            'Source' => __('Source'),
            'Border' => __('Border'),
            'Constrain proportions' => __('Constrain proportions'),
            'Vertical space' => __('Vertical space'),
            'Image description' => __('Image description'),
            'Style' => __('Style'),
            'Dimensions' => __('Dimensions'),
            'Insert image' => __('Insert image'),
            'Insert date/time' => __('Insert date/time'),
            'Insert/edit video' => __('Insert/edit video'),
            'Poster' => __('Poster'),
            'Alternative source' => __('Alternative source'),
            'Paste your embed code below:' => __('Paste your embed code below:'),
            'Insert video' => __('Insert video'),
            'Embed' => __('Embed'),
            // Each of these have a corresponding plugin
            'Special character' => __('Special character'),
            'Right to left' => _x('Right to left', 'editor button'),
            'Left to right' => _x('Left to right', 'editor button'),
            'Emoticons' => __('Emoticons'),
            'Nonbreaking space' => __('Nonbreaking space'),
            'Page break' => __('Page break'),
            'Paste as text' => __('Paste as text'),
            'Preview' => __('Preview'),
            'Print' => __('Print'),
            'Save' => __('Save'),
            'Fullscreen' => __('Fullscreen'),
            'Horizontal line' => __('Horizontal line'),
            'Horizontal space' => __('Horizontal space'),
            'Restore last draft' => __('Restore last draft'),
            'Insert/edit link' => __('Insert/edit link'),
            'Remove link' => __('Remove link'),
            // Spelling, search/replace plugins
            'Could not find the specified string.' => __('Could not find the specified string.'),
            'Replace' => _x('Replace', 'find/replace'),
            'Next' => _x('Next', 'find/replace'),
            /* translators: previous */
            'Prev' => _x('Prev', 'find/replace'),
            'Whole words' => _x('Whole words', 'find/replace'),
            'Find and replace' => __('Find and replace'),
            'Replace with' => _x('Replace with', 'find/replace'),
            'Find' => _x('Find', 'find/replace'),
            'Replace all' => _x('Replace all', 'find/replace'),
            'Match case' => __('Match case'),
            'Spellcheck' => __('Check Spelling'),
            'Finish' => _x('Finish', 'spellcheck'),
            'Ignore all' => _x('Ignore all', 'spellcheck'),
            'Ignore' => _x('Ignore', 'spellcheck'),
            // TinyMCE tables
            'Insert table' => __('Insert table'),
            'Delete table' => __('Delete table'),
            'Table properties' => __('Table properties'),
            'Row properties' => __('Table row properties'),
            'Cell properties' => __('Table cell properties'),
            'Row' => __('Row'),
            'Rows' => __('Rows'),
            'Column' => _x('Column', 'table column'),
            'Cols' => _x('Cols', 'table columns'),
            'Cell' => _x('Cell', 'table cell'),
            'Header cell' => __('Header cell'),
            'Header' => _x('Header', 'table header'),
            'Body' => _x('Body', 'table body'),
            'Footer' => _x('Footer', 'table footer'),
            'Insert row before' => __('Insert row before'),
            'Insert row after' => __('Insert row after'),
            'Insert column before' => __('Insert column before'),
            'Insert column after' => __('Insert column after'),
            'Paste row before' => __('Paste table row before'),
            'Paste row after' => __('Paste table row after'),
            'Delete row' => __('Delete row'),
            'Delete column' => __('Delete column'),
            'Cut row' => __('Cut table row'),
            'Copy row' => __('Copy table row'),
            'Merge cells' => __('Merge table cells'),
            'Split cell' => __('Split table cell'),
            'Height' => __('Height'),
            'Width' => __('Width'),
            'Caption' => __('Caption'),
            'Alignment' => __('Alignment'),
            'Left' => __('Left'),
            'Center' => __('Center'),
            'Right' => __('Right'),
            'None' => _x('None', 'table cell alignment attribute'),
            'Row group' => __('Row group'),
            'Column group' => __('Column group'),
            'Row type' => __('Row type'),
            'Cell type' => __('Cell type'),
            'Cell padding' => __('Cell padding'),
            'Cell spacing' => __('Cell spacing'),
            'Scope' => _x('Scope', 'table cell scope attribute'),
            'Insert template' => _x('Insert template', 'TinyMCE'),
            'Templates' => _x('Templates', 'TinyMCE'),
            'Background color' => __('Background color'),
            'Text color' => __('Text color'),
            'Show blocks' => _x('Show blocks', 'editor button'),
            'Show invisible characters' => __('Show invisible characters'),
            /* translators: word count */
            'Words: {0}' => sprintf(__('Words: %s'), '{0}'),
            'Paste is now in plain text mode. Contents will now be pasted as plain text until you toggle this option off.' => __('Paste is now in plain text mode. Contents will now be pasted as plain text until you toggle this option off.') . "\n\n" . __('If you&#8217;re looking to paste rich content from Microsoft Word, try turning this option off. The editor will clean up text pasted from Word automatically.'),
            'Rich Text Area. Press ALT-F9 for menu. Press ALT-F10 for toolbar. Press ALT-0 for help' => __('Rich Text Area. Press ALT-F9 for menu. Press ALT-F10 for toolbar. Press ALT-0 for help'),
            'You have unsaved changes are you sure you want to navigate away?' => __('The changes you made will be lost if you navigate away from this page.'),
            'Your browser doesn\'t support direct access to the clipboard. Please use the Ctrl+X/C/V keyboard shortcuts instead.' => __('Your browser does not support direct access to the clipboard. Please use keyboard shortcuts or your browser&#8217;s edit menu instead.'),
            // TinyMCE menus
            'Insert' => _x('Insert', 'TinyMCE menu'),
            'File' => _x('File', 'TinyMCE menu'),
            'Edit' => _x('Edit', 'TinyMCE menu'),
            'Tools' => _x('Tools', 'TinyMCE menu'),
            'View' => _x('View', 'TinyMCE menu'),
            'Table' => _x('Table', 'TinyMCE menu'),
            'Format' => _x('Format', 'TinyMCE menu'),
            // WordPress strings
            'Keyboard Shortcuts' => __('Keyboard Shortcuts'),
            'Toolbar Toggle' => __('Toolbar Toggle'),
            'Insert Read More tag' => __('Insert Read More tag'),
            'Read more...' => __('Read more...'), // Title on the placeholder inside the editor
            'Distraction Free Writing' => __('Distraction Free Writing'),
        );

        /**
         * Link plugin (not included):
         * 	Insert link
         * 	Target
         * 	New window
         * 	Text to display
         * 	The URL you entered seems to be an email address. Do you want to add the required mailto: prefix?
         * 	The URL you entered seems to be an external link. Do you want to add the required http:\/\/ prefix?
         * 	Url
         */
        $baseurl = self::$baseurl;
        $mce_locale = self::$mce_locale;

        /**
         * Filter translated strings prepared for TinyMCE.
         *
         * @since 3.9.0
         *
         * @param array  $mce_translation Key/value pairs of strings.
         * @param string $mce_locale      Locale.
         */
        $mce_translation = apply_filters('wp_mce_translation', $mce_translation, $mce_locale);

        foreach ($mce_translation as $key => $value) {
            if (false !== strpos($value, '&')) {
                $mce_translation[$key] = html_entity_decode($value, ENT_QUOTES, 'UTF-8');
            }
        }

        // Set direction
        if (is_rtl()) {
            $mce_translation['_dir'] = 'rtl';
        }

        return "tinymce.addI18n( '$mce_locale', " . json_encode($mce_translation) . ");\n" .
                "tinymce.ScriptLoader.markDone( '$baseurl/langs/$mce_locale.js' );\n";
    }

    public static function editor_js() {
        global $tinymce_version, $concatenate_scripts, $compress_scripts;

        /**
         * Filter "tiny_mce_version" is deprecated
         *
         * The tiny_mce_version filter is not needed since external plugins are loaded directly by TinyMCE.
         * These plugins can be refreshed by appending query string to the URL passed to "mce_external_plugins" filter.
         * If the plugin has a popup dialog, a query string can be added to the button action that opens it (in the plugin's code).
         */
        $version = 'ver=' . $tinymce_version;
        $tmce_on = !empty(self::$mce_settings);

        if (!isset($concatenate_scripts))
            script_concat_settings();

        $compressed = $compress_scripts && $concatenate_scripts && isset($_SERVER['HTTP_ACCEPT_ENCODING']) && false !== stripos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip');

        $mceInit = $qtInit = '';
        if ($tmce_on) {
            foreach (self::$mce_settings as $editor_id => $init) {
                $options = self::_parse_init($init);
                $mceInit .= "'$editor_id':{$options},";
            }
            $mceInit = '{' . trim($mceInit, ',') . '}';
        } else {
            $mceInit = '{}';
        }

        if (!empty(self::$qt_settings)) {
            foreach (self::$qt_settings as $editor_id => $init) {
                $options = self::_parse_init($init);
                $qtInit .= "'$editor_id':{$options},";
            }
            $qtInit = '{' . trim($qtInit, ',') . '}';
        } else {
            $qtInit = '{}';
        }

        $ref = array(
            'plugins' => implode(',', self::$plugins),
            'theme' => 'modern',
            'language' => self::$mce_locale
        );

        $suffix = ( defined('SCRIPT_DEBUG') && SCRIPT_DEBUG ) ? '' : '.min';

        /**
         * Fires immediately before the TinyMCE settings are printed.
         *
         * @since 3.2.0
         *
         * @param array $mce_settings TinyMCE settings array.
         */
        do_action('before_wp_tiny_mce', self::$mce_settings);
        ?>

        <script type="text/javascript">
            tinyMCEPreInit = {
                baseURL: "<?php echo self::$baseurl; ?>",
                suffix: "<?php echo $suffix; ?>",
        <?php
        if (self::$drag_drop_upload) {
            echo 'dragDropUpload: true,';
        }
        ?>
                mceInit: <?php echo $mceInit; ?>,
                qtInit: <?php echo $qtInit; ?>,
                ref: <?php echo self::_parse_init($ref); ?>,
                load_ext: function(url, lang) {
                    var sl = tinymce.ScriptLoader;
                    sl.markDone(url + '/langs/' + lang + '.js');
                    sl.markDone(url + '/langs/' + lang + '_dlg.js');
                }
            };
        </script>
        <?php
        $baseurl = self::$baseurl;
        // Load tinymce.js when running from /src, else load wp-tinymce.js.gz (production) or tinymce.min.js (SCRIPT_DEBUG)
        $mce_suffix = false !== strpos($GLOBALS['wp_version'], '-src') ? '' : '.min';

        if ($tmce_on) {
            if ($compressed) {
                echo "<script type='text/javascript' src='{$baseurl}/wp-tinymce.php?c=1&amp;$version'></script>\n";
            } else {
                echo "<script type='text/javascript' src='{$baseurl}/tinymce{$mce_suffix}.js?$version'></script>\n";
                echo "<script type='text/javascript' src='{$baseurl}/plugins/compat3x/plugin{$suffix}.js?$version'></script>\n";
            }

            echo "<script type='text/javascript'>\n" . self::wp_mce_translation() . "</script>\n";

            if (self::$ext_plugins) {
                // Load the old-format English strings to prevent unsightly labels in old style popups
                echo "<script type='text/javascript' src='{$baseurl}/langs/wp-langs-en.js?$version'></script>\n";
            }
        }

        /**
         * Fires after tinymce.js is loaded, but before any TinyMCE editor
         * instances are created.
         *
         * @since 3.9.0
         *
         * @param array $mce_settings TinyMCE settings array.
         */
        do_action('wp_tiny_mce_init', self::$mce_settings);
        ?>
        <script type="text/javascript">
        <?php
        if (self::$ext_plugins)
            echo self::$ext_plugins . "\n";

        if (!is_admin())
            echo 'var ajaxurl = "' . admin_url('admin-ajax.php', 'relative') . '";';
        ?>

            (function() {
                var init, edId, qtId, firstInit, wrapper;

                if (typeof tinymce !== 'undefined') {
                    for (edId in tinyMCEPreInit.mceInit) {
                        if (firstInit) {
                            init = tinyMCEPreInit.mceInit[edId] = tinymce.extend({}, firstInit, tinyMCEPreInit.mceInit[edId]);
                        } else {
                            init = firstInit = tinyMCEPreInit.mceInit[edId];
                        }

                        wrapper = tinymce.DOM.select('#wp-' + edId + '-wrap')[0];

                        if ((tinymce.DOM.hasClass(wrapper, 'tmce-active') || !tinyMCEPreInit.qtInit.hasOwnProperty(edId)) &&
                                !init.wp_skip_init) {

                            try {
                                tinymce.init(init);

                                if (!window.wpActiveEditor) {
                                    window.wpActiveEditor = edId;
                                }
                            } catch (e) {
                            }
                        }
                    }
                }

                if (typeof quicktags !== 'undefined') {
                    for (qtId in tinyMCEPreInit.qtInit) {
                        try {
                            quicktags(tinyMCEPreInit.qtInit[qtId]);

                            if (!window.wpActiveEditor) {
                                window.wpActiveEditor = qtId;
                            }
                        } catch (e) {
                        }
                        ;
                    }
                }

                if (typeof jQuery !== 'undefined') {
                    jQuery('.wp-editor-wrap').on('click.wp-editor', function() {
                        if (this.id) {
                            window.wpActiveEditor = this.id.slice(3, -5);
                        }
                    });
                } else {
                    for (qtId in tinyMCEPreInit.qtInit) {
                        document.getElementById('wp-' + qtId + '-wrap').onclick = function() {
                            window.wpActiveEditor = this.id.slice(3, -5);
                        }
                    }
                }
            }());
        </script>
        <?php
        if (in_array('wplink', self::$plugins, true) || in_array('link', self::$qt_buttons, true))
            self::wp_link_dialog();

        if (in_array('wpfullscreen', self::$plugins, true) || in_array('fullscreen', self::$qt_buttons, true))
            self::wp_fullscreen_html();

        /**
         * Fires after any core TinyMCE editor instances are created.
         *
         * @since 3.2.0
         *
         * @param array $mce_settings TinyMCE settings array.
         */
        do_action('after_wp_tiny_mce', self::$mce_settings);
    }

    public static function wp_fullscreen_html() {
        global $content_width;
        $post = get_post();

        $width = isset($content_width) && 800 > $content_width ? $content_width : 800;
        $width = $width + 22; // compensate for the padding and border
        $dfw_width = get_user_setting('dfw_width', $width);
        $save = isset($post->post_status) && $post->post_status == 'publish' ? __('Update') : __('Save');
        ?>
        <div id="wp-fullscreen-body" class="wp-core-ui<?php if (is_rtl()) echo ' rtl'; ?>" data-theme-width="<?php echo (int) $width; ?>" data-dfw-width="<?php echo (int) $dfw_width; ?>">
            <div id="fullscreen-topbar">
                <div id="wp-fullscreen-toolbar">
                    <div id="wp-fullscreen-close"><a href="#" onclick="wp.editor.fullscreen.off();
                return false;"><?php _e('Exit fullscreen'); ?></a></div>
                    <div id="wp-fullscreen-central-toolbar" style="width:<?php echo $width; ?>px;">

                        <div id="wp-fullscreen-mode-bar">
                            <div id="wp-fullscreen-modes" class="button-group">
                                <a class="button wp-fullscreen-mode-tinymce" href="#" onclick="wp.editor.fullscreen.switchmode('tinymce');
                return false;"><?php _e('Visual'); ?></a>
                                <a class="button wp-fullscreen-mode-html" href="#" onclick="wp.editor.fullscreen.switchmode('html');
                return false;"><?php _ex('Text', 'Name for the Text editor tab (formerly HTML)'); ?></a>
                            </div>
                        </div>

                        <div id="wp-fullscreen-button-bar"><div id="wp-fullscreen-buttons" class="mce-toolbar">
        <?php
        $buttons = array(
            // format: title, onclick, show in both editors
            'bold' => array('title' => __('Bold (Ctrl + B)'), 'both' => false),
            'italic' => array('title' => __('Italic (Ctrl + I)'), 'both' => false),
            'bullist' => array('title' => __('Unordered list (Alt + Shift + U)'), 'both' => false),
            'numlist' => array('title' => __('Ordered list (Alt + Shift + O)'), 'both' => false),
            'blockquote' => array('title' => __('Blockquote (Alt + Shift + Q)'), 'both' => false),
            'wp-media-library' => array('title' => __('Media library (Alt + Shift + M)'), 'both' => true),
            'link' => array('title' => __('Insert/edit link (Alt + Shift + A)'), 'both' => true),
            'unlink' => array('title' => __('Unlink (Alt + Shift + S)'), 'both' => false),
            'help' => array('title' => __('Help (Alt + Shift + H)'), 'both' => false),
        );

        /**
         * Filter the list of TinyMCE buttons for the fullscreen
         * 'Distraction Free Writing' editor.
         *
         * @since 3.2.0
         *
         * @param array $buttons An array of TinyMCE buttons for the DFW editor.
         */
        $buttons = apply_filters('wp_fullscreen_buttons', $buttons);

        foreach ($buttons as $button => $args) {
            if ('separator' == $args) {
                continue;
            }

            $onclick = !empty($args['onclick']) ? ' onclick="' . $args['onclick'] . '"' : '';
            $title = esc_attr($args['title']);
            ?>

                                    <div class="mce-widget mce-btn<?php if ($args['both']) { ?> wp-fullscreen-both<?php } ?>">
                                        <button type="button" aria-label="<?php echo $title; ?>" title="<?php echo $title; ?>"<?php echo $onclick; ?> id="wp_fs_<?php echo $button; ?>">
                                            <i class="mce-ico mce-i-<?php echo $button; ?>"></i>
                                        </button>
                                    </div>
                                    <?php
                                }
                                ?>

                            </div></div>

                        <div id="wp-fullscreen-save">
                            <input type="button" class="button button-primary right" value="<?php echo $save; ?>" onclick="wp.editor.fullscreen.save();" />
                            <span class="wp-fullscreen-saved-message"><?php if ($post->post_status == 'publish') _e('Updated.');
                        else _e('Saved.'); ?></span>
                            <span class="wp-fullscreen-error-message"><?php _e('Save failed.'); ?></span>
                            <span class="spinner"></span>
                        </div>

                    </div>
                </div>
            </div>
            <div id="wp-fullscreen-statusbar">
                <div id="wp-fullscreen-status">
                    <div id="wp-fullscreen-count"><?php printf(__('Word count: %s'), '<span class="word-count">0</span>'); ?></div>
                    <div id="wp-fullscreen-tagline"><?php _e('Just write.'); ?></div>
                </div>
            </div>
        </div>

        <div class="fullscreen-overlay" id="fullscreen-overlay"></div>
        <div class="fullscreen-overlay fullscreen-fader fade-300" id="fullscreen-fader"></div>
        <?php
    }

    /**
     * Performs post queries for internal linking.
     *
     * @since 3.1.0
     *
     * @param array $args Optional. Accepts 'pagenum' and 's' (search) arguments.
     * @return array Results.
     */
    public static function wp_link_query($args = array()) {
        $pts = get_post_types(array('public' => true), 'objects');
        $pt_names = array_keys($pts);

        $query = array(
            'post_type' => $pt_names,
            'suppress_filters' => true,
            'update_post_term_cache' => false,
            'update_post_meta_cache' => false,
            'post_status' => 'publish',
            'posts_per_page' => 20,
        );

        $args['pagenum'] = isset($args['pagenum']) ? absint($args['pagenum']) : 1;

        if (isset($args['s']))
            $query['s'] = $args['s'];

        $query['offset'] = $args['pagenum'] > 1 ? $query['posts_per_page'] * ( $args['pagenum'] - 1 ) : 0;

        /**
         * Filter the link query arguments.
         *
         * Allows modification of the link query arguments before querying.
         *
         * @see WP_Query for a full list of arguments
         *
         * @since 3.7.0
         *
         * @param array $query An array of WP_Query arguments.
         */
        $query = apply_filters('wp_link_query_args', $query);

        // Do main query.
        $get_posts = new WP_Query;
        $posts = $get_posts->query($query);
        // Check if any posts were found.
        if (!$get_posts->post_count)
            return false;

        // Build results.
        $results = array();
        foreach ($posts as $post) {
            if ('post' == $post->post_type)
                $info = mysql2date(__('Y/m/d'), $post->post_date);
            else
                $info = $pts[$post->post_type]->labels->singular_name;

            $results[] = array(
                'ID' => $post->ID,
                'title' => trim(esc_html(strip_tags(get_the_title($post)))),
                'permalink' => get_permalink($post->ID),
                'info' => $info,
            );
        }

        /**
         * Filter the link query results.
         *
         * Allows modification of the returned link query results.
         *
         * @since 3.7.0
         *
         * @see 'wp_link_query_args' filter
         *
         * @param array $results {
         *     An associative array of query results.
         *
         *     @type array {
         *         @type int    $ID        Post ID.
         *         @type string $title     The trimmed, escaped post title.
         *         @type string $permalink Post permalink.
         *         @type string $info      A 'Y/m/d'-formatted date for 'post' post type,
         *                                 the 'singular_name' post type label otherwise.
         *     }
         * }
         * @param array $query  An array of WP_Query arguments.
         */
        return apply_filters('wp_link_query', $results, $query);
    }

    /**
     * Dialog for internal linking.
     *
     * @since 3.1.0
     */
    public static function wp_link_dialog() {
        $search_panel_visible = '1' == get_user_setting('wplink', '0') ? ' search-panel-visible' : '';

        // display: none is required here, see #WP27605
        ?>
        <div id="wp-link-backdrop" style="display: none"></div>
        <div id="wp-link-wrap" class="wp-core-ui<?php echo $search_panel_visible; ?>" style="display: none">
            <form id="wp-link" tabindex="-1">
        <?php wp_nonce_field('internal-linking', '_ajax_linking_nonce', false); ?>
                <div id="link-modal-title">
        <?php _e('Insert/edit link') ?>
                    <button type="button" id="wp-link-close"><span class="screen-reader-text"><?php _e('Close'); ?></span></button>
                </div>
                <div id="link-selector">
                    <div id="link-options">
                        <p class="howto"><?php _e('Enter the destination URL'); ?></p>
                        <div>
                            <label><span><?php _e('URL'); ?></span><input id="url-field" type="text" name="href" /></label>
                        </div>
                        <div>
                            <label><span><?php _e('Title'); ?></span><input id="link-title-field" type="text" name="linktitle" /></label>
                        </div>
                        <div class="link-target">
                            <label><span>&nbsp;</span><input type="checkbox" id="link-target-checkbox" /> <?php _e('Open link in a new window/tab'); ?></label>
                        </div>
                    </div>
                    <p class="howto"><a href="#" id="wp-link-search-toggle"><?php _e('Or link to existing content'); ?></a></p>
                    <div id="search-panel">
                        <div class="link-search-wrapper">
                            <label>
                                <span class="search-label"><?php _e('Search'); ?></span>
                                <input type="search" id="search-field" class="link-search-field" autocomplete="off" />
                                <span class="spinner"></span>
                            </label>
                        </div>
                        <div id="search-results" class="query-results" tabindex="0">
                            <ul></ul>
                            <div class="river-waiting">
                                <span class="spinner"></span>
                            </div>
                        </div>
                        <div id="most-recent-results" class="query-results" tabindex="0">
                            <div class="query-notice" id="query-notice-message">
                                <em class="query-notice-default"><?php _e('No search term specified. Showing recent items.'); ?></em>
                                <em class="query-notice-hint screen-reader-text"><?php _e('Search or use up and down arrow keys to select an item.'); ?></em>
                            </div>
                            <ul></ul>
                            <div class="river-waiting">
                                <span class="spinner"></span>
                            </div>
                        </div>
                    </div>
                </div>
                <div class="submitbox">
                    <div id="wp-link-cancel">
                        <a class="submitdelete deletion" href="#"><?php _e('Cancel'); ?></a>
                    </div>
                    <div id="wp-link-update">
                        <input type="submit" value="<?php esc_attr_e('Add Link'); ?>" class="button button-primary" id="wp-link-submit" name="wp-link-submit">
                    </div>
                </div>
            </form>
        </div>
        <?php
    }

}
